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Author Topic: Slaved stepper not moving the same amount???  (Read 5852 times)

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Offline Hood

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Re: Slaved stepper not moving the same amount???
« Reply #10 on: August 02, 2014, 06:46:18 PM »
Ok not 100% sure what you are meaning regards "same motor", if you are meaning you changed the plugs around and it stayed with the slave side then its not motor or drive. If you are meaning that it swapped over to the master side then it is a problem with motor or drive.
Hood
Re: Slaved stepper not moving the same amount???
« Reply #11 on: August 02, 2014, 06:54:51 PM »
Ok, I have the Y axis motors labeled YR and YL

No matter what is do, the YR stepper is always behind the YL

I can switch Gecko 202's, leads,pins in Mach3, ect and always the actual YR motor always is behind the YL...

For instance, after 5 revolutions of the YL...the YR is about 90 degrees behind the YL

No matter what is change in Pins, Geckos, outputs from the Breakout Board...

The actual YR motor trails the YL ....

Thus, I cannot see how it could be anything other than the YR stepper being bad...

Does this make since???

Thanks Hood!!!

Offline Hood

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Re: Slaved stepper not moving the same amount???
« Reply #12 on: August 02, 2014, 06:59:28 PM »
Ok  if its always staying with the same physical motor, ie following the motor as you swap things around, then yes it would seem to be the motor.
Hood
Re: Slaved stepper not moving the same amount???
« Reply #13 on: August 02, 2014, 07:16:07 PM »
Thanks for all the help SO MUCH Hood!!!!!!

I could not have done this with you...

I will be ordering a new stepper, but this one has 4 leads and the new one of the same model
that Oriential sells now has 6 wires...will it be compatible with the other 4 wire, or do I need
to buy 2 new ones???


Very Best Regards,

Preston

Offline Hood

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Re: Slaved stepper not moving the same amount???
« Reply #14 on: August 03, 2014, 04:14:27 AM »
You will just have to connect the motor in series to be the same as the one you have now, so should be no need for two motors.
Hood

Online Tweakie.CNC

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Re: Slaved stepper not moving the same amount???
« Reply #15 on: August 03, 2014, 06:22:20 AM »
Quote
I will be ordering a new stepper, but this one has 4 leads and the new one of the same model
that Oriential sells now has 6 wires...will it be compatible with the other 4 wire, or do I need
to buy 2 new ones???

Hi Preston,

I don't know if this helps...

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: Slaved stepper not moving the same amount???
« Reply #16 on: August 03, 2014, 02:19:44 PM »
Ok, to test this all out before ordering a new stepper like the old one...

I have several new smaller steppers that are the same.

Could I hook 2 of them up and check to see that these 2 operate normally and
one does not loose 90 degrees after 5 revolutions?

That should confirm if the other stepper is really bad, correct???

Best Regards,

Preston

Offline Hood

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Re: Slaved stepper not moving the same amount???
« Reply #17 on: August 03, 2014, 02:21:46 PM »
You should be able to do that as long as you make sure you have limited the current on the Gecko to suit those smaller steppers, assuming they require less than the current ones.
Hood
Re: Slaved stepper not moving the same amount???
« Reply #18 on: August 03, 2014, 05:05:59 PM »
Ok, the small steppers use less voltage than the Gecko 202's are rated for...

But, the router has 2 other of these same Oriental Motors of exactly the same size...duh...too close to the problem!

I swapped one of these motors for the one acting up and it does the same thing...looses about 45 degrees after
5 revolutions...so the other motor, looks to be good.

What now???

Could it be a bad connection in one of the plugs?

Best Regards,

Preston
Re: Slaved stepper not moving the same amount???
« Reply #19 on: August 03, 2014, 05:42:01 PM »
Hi Preston,
  I see in your xml that the pulse width for both motors are set at 0 in motor tuning. Maybe increase both to 5 just to see if it makes any difference.
If you said earlier, I apologize, but do you know which motor is actually moving the correct distance ? The leader, or the lagger ?

Russ